%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%          LADDER           %%
%%      Aurélien CADIOU      %%
%% [email protected] %%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%% Licence : MIT licence
%% Repository : https://github.com/AurelienC/tex-ladder

\NeedsTeXFormat{LaTeX2e}[1999/01/01]
\ProvidesPackage{ladder}[2017/05/17]


% Packages required
\RequirePackage{tikz}
\RequirePackage{ifthen}
\RequirePackage{calc}


\newcounter{nextY}%
\newcounter{nextYPar}%
\newcounter{nextX}%
\newcounter{currentY}%
\newcounter{currentX}%
\newcounter{tempCurrentY}%
\newcounter{startPar}%
\newcounter{stopPar}%
\newcounter{memCurrentX}%
\newcounter{memCurrentY}%


%%% NEW LINE %%%
\newcommand{\ladderLine}[0]{
       % Updating variables
       \setcounter{currentX}{0}
       \setcounter{nextX}{0}
       \setcounter{currentY}{\value{nextY}}
}


%%% TEXT %%%
\newcommand{\ladderText}[3][]{
       \draw[text centered](\value{currentX}+1,\value{currentY}+1) node {\textbf{#2}};
       \draw[text centered](\value{currentX}+1,\value{currentY}+0.5) node {\textit{#3}};
       \draw[text centered](\value{currentX}+1,\value{currentY}) node {\texttt{\LARGE{#1}}};
}


%%% NO CONTACT %%%
\newcommand{\ladderNO}[3][]{
       % Updating variables
       \setcounter{currentX}{\value{nextX}}
       \setcounter{tempCurrentY}{\value{currentY}-2}
       \ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
       \ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
       \addtocounter{nextX}{2}

       % Drawing
       \draw(\value{currentX}+0.75,\value{currentY}+0.25) -- (\value{currentX}+0.75,\value{currentY}-0.25); % First bar of NO contact
       \draw(\value{currentX}+1.25,\value{currentY}+0.25) -- (\value{currentX}+1.25,\value{currentY}-0.25); % Second bar of NO contact
       \draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.75,\value{currentY}); % Connection
       \draw(\value{currentX}+1.25,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
       \ladderText[#1]{#2}{#3}
}


%%% NC CONTACT %%%
\newcommand{\ladderNC}[3][]{
       % Updating variables
       \setcounter{currentX}{\value{nextX}}
       \setcounter{tempCurrentY}{\value{currentY}-2}
       \ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
       \ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
       \addtocounter{nextX}{2}

       % Drawing
       \draw(\value{currentX}+0.75,\value{currentY}+0.25) -- (\value{currentX}+0.75,\value{currentY}-0.25) -- (\value{currentX}+1.25,\value{currentY}+0.25) -- (\value{currentX}+1.25,\value{currentY}-0.25); % NC contact
       \draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.75,\value{currentY}); % Connection
       \draw(\value{currentX}+1.25,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
       \ladderText[#1]{#2}{#3}
}


%%% COILS %%%
\newcommand{\ladderC}[3][]{
       % Updating variables
       \setcounter{currentX}{\value{nextX}}
       \setcounter{tempCurrentY}{\value{currentY}-2}
       \ifthenelse{\value{nextY}>\value{tempCurrentY}}{\setcounter{nextY}{\value{tempCurrentY}}}{}
       \ifthenelse{\value{nextYPar}>\value{tempCurrentY}}{\setcounter{nextYPar}{\value{tempCurrentY}}}{}
       \addtocounter{nextX}{2}

       % Drawing
       \draw (\value{currentX}+1,\value{currentY}) circle (0.3);
       \draw(\value{currentX},\value{currentY}) -- (\value{currentX}+0.7,\value{currentY}); % Connection
       \draw(\value{currentX}+1.3,\value{currentY}) -- (\value{nextX},\value{currentY}); % Connection
       \ladderText[#1]{#2}{#3}
}



%%% START OF PARALLEL SECTION %%%
\newcommand{\startParallel}[0]{
       \setcounter{startPar}{\value{nextX}} % Store the X of beginning
}



%%% DEBUT PARALLELE %%%
\newcommand{\setParallel}[0]{
 \setcounter{stopPar}{\value{nextX}}%
 \draw(\value{startPar},\value{currentY}) -- (\value{startPar},\value{nextYPar}); % Vertical bar
 \setcounter{memCurrentX}{\value{nextX}}%
 \setcounter{memCurrentY}{\value{currentY}}%
 \setcounter{nextX}{\value{startPar}}%
 \setcounter{currentY}{\value{nextYPar}}%
}


%%% END OF PARALLEL SECTION %%%
\newcommand{\unsetParallel}[0]{
 % Parallel section is more larger than "normal" section test
 \ifthenelse{\value{nextX}>\value{memCurrentX}}{}{\draw(\value{nextX},\value{currentY}) -- (\value{stopPar},\value{currentY}) -- (\value{stopPar},\value{memCurrentY});}
 \ifthenelse{\value{nextX}>\value{memCurrentX}}{\draw (\value{nextX},\value{currentY}) -- (\value{nextX},\value{memCurrentY}) -- (\value{memCurrentX},\value{memCurrentY});}{\setcounter{nextX}{\value{memCurrentX}}}
 \setcounter{currentY}{\value{memCurrentY}}
 \setcounter{nextYPar}{0}
}